import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'

Vue.use(VueRouter)

const routes = [
  {path:'/',redirect: '/login'},
  { path: '/login', component: Login },
  { path: '/home', component: Home }
]

const router = new VueRouter({
  routes
})

// 挂载路由守卫
router.beforeEach((to,from,next)=>{
  // to,将要跳转页面
  // from,从那个页面跳转
  //放行。 next()    next('/login')强制跳转
  if(to.path==='/login') return next();
  // 获取token
  const tokenStr=window.sessionStorage.getItem('token')
  // 没有token,强制登录login
  if(!tokenStr) return next('/login');
  // 有token直接放行
  next();

})

export default router

